Safety appliance for elevators.



No. 837,168. PATBNTED NGV. 27, 1906. E. E. WILSON. SFBTY AJPLIANCB FR BLEVTORS. APPLIGATIDN FILED HARM. 19GB.

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rs! Naim: PINI# eo., Walumaron, n. e.

No. 83'7,68, PATENTED NOV, 27, 1906.

H. H. WILSON. SAFETY APPLIANGB FR ELBVATORS.

APPLIGATXON FILED MALSS. 1905.

2 SHEETS-SHEET 2 Snowdon HEARLEY HOWELL WILSON, OF ALTOONA, PENNSYLVANIA.

SAFETY APPLIANCE FOR ELEVATOFIS.

Specification of Letters Patent.

Patented No'v. 27, 9015.

Application tiled Marti 23. 1906. crsi No. 337709.

To rfi/ mls/nm, if may r'mwlzft:

Be it known that i, Herinner HOWELL WILSON, a citizen ofthe United States, residing at Altoona, in the county of Blair nnd Sinti' of l)crnis \'l\'nni:| :we lnvcnlcii wiwi; non' and nsclni improvements in Sait-ij, 15V

plisnces for Elevators, of which the following Ineens by which it is impossible to nieve the I elevator-car wlile the door nt wiiicii tile car is standing is open.

Another object is to provide means by which it is impossible to open ilie door to tite elevetonsiiaft while tre car is at any point. in tite shaft other than directly in front oi the shaft-door and to automatically unlock the Y S siiding in bearings 23 of tite incitingdoor when tite tending is reached.

A further object of tizis device is to proi vide means by which the elevator-csr is locked against control by the opening'o tite shaft-door and can only be moved by the operator closing such door in front of which the car is standing, after whichthe car is free to move the full lengthV of the shaft. Without interfering Wit-l1 the locking mechanism et any door except those at which the operator desires to stop.

Witlithese and many other objects in View, that will be pointed ont as tite nature of tite invention is better understood, tige same consists in the novel construct ion, combination, and arrangement of parts as lnroin pointed ont, iilnstrated, and ciaimcd,

It slionid be inrtinr understood that this invention is snscopiililc to structural change or modifient-ion without departing1V lrom the scope oi the invention, but u` preferable cmA bodiment ot the sinne is sliown in the accompanying drawings, in which- Figure 1 is a plan view of the operating mechanism of the present invention as it ep ears beneath the elevator-car floor, the floor sing shown removed. Fig. 2 is n side View of the parts slioxm in Fig. 1, showingr in section a portion oi tile car-landing. Figs. S, fl,

and 5 nre plan, sido, 11nd ond rlcvat ion views l of the locking-lnnckct, showing llio iocni ion of the locl ing-plnngcr openinglr and ilie rlesrx 2 vater-shaft door.

ence-slot for lir inciting-plato. Figs. 6 and are plain end side elevation views of the locking-plate together with the roller mounted in position. Figs. 8, 9, sind i() are pien, sido, und nml oli-union rions nl lio springqilntr il. nl is secured to tic door of i! c iicvziloi' snaft. Figs. il and 12 are top and side views of iife iorlring-plnngnr tira( receives iiic lockisigvplaiiin one ond and ille operaiingvlinlrnt 12.@ or rrr.

Sixniisr characters refer to simiiar parts throughout Lne several views of the drawings.

Tite mechanism may be described as foliows.

Figs. i and 2 snow tlie relative position and locai ion of parts on tlie elevator-car and also tiiosc at tie cnr-landing when tite csr is im- Inedisteiiv in iront oi the landing or tlie clef Referring particularly to 'siiese views, l represents the operating-shaft,

that is actuated through the toothed segnient 5 and the segment-gear 6 on said shaft.

Y A crank 2 on tlic shaft i is connected through tire intermediate link 3 to tiielockingilunffcr lnac ell E). Tite locking-plunger 8 is provided with a slot 21, which receives the locking-plate i1, provided with e locking-cam edge 19 at one end and a forked opening et the other in which is carried the roller 13, which is to be provided with grooves or some frictional substance. v

To operate the mechanism, the operatinglever 7 is moved from its central position, which movement rotates the gear 6, which in turn moves the operatingvsiinft 1. The crank 2 lacing iixed upon the operating-shaft, any movement of the shaft will necessarily resnit. in a movement of the crnnlr. 'liiis wiil reuse ilw lin-.lring-plnngcr to move iniciiwnrd from the landing 23, locking the siinftaiioor tiirongii tiic medium of the lioolr 15 oi Erln spring 17 engaging tlic fixed cati-ii iti si the lending, tlins locking the door und leaving tlic car free to more.

li it is assumed that the car has reached tlie ianding 23, as shown in Fig. 2, and the o ierator opens the door of the shaft to diseliarge passengers, the position of the opera tingle\fer?1n1istlic vertical orin such a position that the spring-plate 24 wili engage the relier 13. rilns engagement of tlie springpiate 24 A(which is secured to tile shaft-door sind which is to lic grnovcd or revered with l r A 1 some irictionnl substance) n'itii tlie roller 13 on tln rar will canso the iorkingqalntc Il to IOO assume a osition as shown in dotted lines in Fig. 1. n this position the locking edge 19 of the locking-plate 11 will enage an urislot-` ted edge or side 198L of the loc thus preventing any movement of the o erating-lever 7, and hence any movement o the car 1n either direction. It will also be noticed that the edge of the roller does not disengage with the spring-plate until the locking ed e 19 has engaged the lockmg-edge of the loc ing-bracket. Shouldlslippin occur between the roller 13 andthe sprlng-p ate 24 upon opening the door, the pin 25, which passes through the plunger S and its in the circular groove 18 of the locking-plate, will cause the plate, with the roller, to resume its roper osition when closing the door. Should t 1e slipping occur when the door is closed, the tapered groove 2O in the lockingbracket 9 will guide the plate 1l to its propel placefwhen starting the car. jfIhis groove 2() 1s only for the purpose of taking care of the slipping of the mechanism that is' not to be accounted for otherwise. In other words, it will be noted that in the closin movement of the door the tendency to roc the plate 11 past a correctly-alined position with the clearance-notch 10 of the bracket 9 is corrected by the pin 25*,that is, the pin 25 acts asa stop for the plate 11 when 1t reaches a proper alinement with the clearance-notch IO-and in the event of the plate l1 being but slightly inclined the tapered groove 20, when the lunger 8 is drawn upon, will permit the p ate 11 to properly slide into the l'lotch'nur.'^` 1 1 .-.l-.;rr This device is applicableto elevator-cars Withflever control with-fulcruinlaboveor beleoor 'and trcai'vvitlffvvhel control bysubstituting forgear-Whelsja" chain anda s rocket mounted OnJhliG QlllljQllngWhcel s aft'a'ndas :rocketimountedo the shaft of thel device, t e'gear ratio to be-such that the shaft of the device will revolve through one hundred and eighty degrees when the controlling-Wheel is revolved.

'ng-bracket 9,

It will be observed that when the roller of the locking plate or disk 11 is disengaged from the contaetplate 24 of the s rin -latch device 17, carrie by the shaftoor the latter is free to spring into engagement with the fixed keeper' or catch 16, and through the reciprocation of the latch device when said roller is engaged therewith the lockinglate 11 is thrown 1n or out of alinement wit 1 the clearance-notch l0 of the bracket 9.

I claim- 1. In a safety device .for elevators the combination with the shaft-door, a latch device for said door, ilul elevator-car, and the elevator-controller carried by the latter, of a locking device carried by the car comprising a reciprocatory locking-plunger o eratively connected with the elevator-contro ler, and a movable locking-plate pivotally mounted on the )longer and carrying n contact member for flrictional engagement with said latch device, Said locking-plate being adapted to be swung into interfering and non-interfering relation to a fixed abutment.

2. In a saet device for elevators, the combination wit the shaft-door, of a springlatch device carried by said door, the elevator-car and the elevator-controller carried thereb and a lookin device carried by the car and7 embodying a ed locking-bracket a reciprocatory lockmglunger carried b the bracket and operative y connected wit the elevator-controller, and a swinging lockingplate pivoted to the locking-plunger and carrying a contact member for rictional en agement with the latch device, saidloc ingplate being adapted to be swung by the move-ment of'l the flatch device respectively into interferinggfandnon-interferingsrelatipp to said brackets' In testimon signature in t e resnce of two vitness'es.

' HOWELL 'WILSON' Witnesses: j i "1 FRED. A. WHITTAKER, NORMAN E. GEE.

whereof I hereunto ,',aflrl my 

